Metal-working tool.



F. P. LIOVEJOY.

' METAL WORKING TOO L. APPLICATION FILED MAY 24. 1.9111 I 1,242,708. Patented 0ct.9,1917.

I I III W615.

UNITED STATES "PATENT QFIE,

FRED'P. LovE'JoY, or srf mGF EnnyEmuonT;

'METALwoRx ve TOOL. v

To all whom/it may concern:

Be it known'that I, FRED P. LovEJoY, a citizen of the United States, residing at Springfield, in the county of Windsor and State of Vermont, have invented new and useful Improvements in MetaLWorking Tools, of which'the following is a specification. v

This invention relates to me'tahworking tools and its object is toprovide'an. im-

proved combination consisting'of cutterpa holder therefor, and meansfor securing the cutter rigidly in the holder, to the end that the cutter and holder will be, to all intents and purposes, as rigid as though they were integral. The advantage of such a combination is that a cutter of the highest grade and most expensive steel may be used economically with a holder of lessexpensive steel, and that when the cutter has become toofar worn by use and byresharpening' it can be thrown away and another cutter substituted for it without-excess waste.'-

The cutter is locked in'the holder-by a shoe, and is tightened by a cotter that is arranged to exercise a wedging action upon the shoe. The cutter and shoe are provided with interlocking teeth that sustain the endthrust of the cutter and that afford various positions of adjustment of the cutter. Inasmuch as the wedging action occurs between the cotter'and the shoe it does not wear or otherwise injure the interlocking teeth of 'the shoe or those of the cutter, and an exceedingly tight wedgin'g actionmay be produced without liability of injuring the teeth. Referring to the accompanying drawings, which illustrate the present invention; in what I now consider the preferred form Figure 1 represents a side elevation ofa complete tool the several parts of which are assembled for operation. 7 v V Fig. 2 represents a section through" the structure intersected by line 2 .2- of Fig.1. Fig. 3 represents a section in a vertical 'plane'of the portion of theholder in which the sockets are formed. 7

Fig. 4 represents a side elevation of the 'weclging cotter.

Fig. 5 represents a cross-section through The same reference characters indicate the same parts wherever they occur.

The holder 10 is provided with three sockets 11, 12, and 13 respectively, the first for a cutter 14, the seco'ndfo'r' a locking shoe 15,

' Specificationof was at-.1

relation,

and third for. a cotter 1 6.- -These sockets are iallipreferably cylindric in form, and. themembers 14, 15,- and 16 vare made from cylindricstock; The socketsll and 13 are .nearly parallel but their axes, as indicated by F 3, are at a-slight angle relatively to least, to arrange them strictly 'inparallel The socket 12 intersects both the sockets 11 and 13 midis-arranged to extend substantially at right angles in relation; to

them. r The cutter 14 is provided with-a series of teeth 17 whereby it may be locked'against endwisemovement- The locking shoe 15 is provided with looking teeth 18 adaptedto occupy interlocked relation-with the teeth 17. IThe teeth 17 extend substantially at right anglesto the axis of the cutter, but the teeth 18 :extend" substantially parallel 'to the 'respectivesockets theteeth serve to sustain end-thrust ofthe cutter, and such end-thrust V V ratenteuoet e,19m; "Application filed May 24,1917. semi No. 170,652. I

"each other, although it would be within'the scope of the invention, to some extent at axis ofth'e'shoe, and when the shoe and cutis transmitted'by the shoe to that portion of the holder indicated at 19. in Fig. f3;

I The shoe is providedzwith'a-notch dia metrically opposite the teeth. 18, toirece ive a portion of the cotter 16as shown by .Fig. 2, the shoe being thereby locked so that it canone" upon the other,"'face 21 being inclined slightly in relation to the'axis of the cotter not slip from its socket. The shoe and cotter are provided with fiat faces 20 andv 21 to compensate for the angularrelation of" the axes" of sockets -11 and'13. 1 Thus, al-' though the cotter; has 'a wedge formation,

when the several parts are assembled "co operative relation as shown by Fig. 1, the

face 21 is substantially parallel'to the axis of theioutt'er; For this reason the fiat face 20 of the locking shoe maybe parallel to the plane of the teeth '18, and the shoe may be reversed, end forend, without affecting its cooperative-relation to the cutter or its cooperative relation 'to' the cotter. A T-he cotter nevertheless exercises a wedging action upon the shoe,"when driven endwise' from the'top of theholder toward {the bottom, said' action 7 being a due to-Ftheangular relation'ofjthe sockets 11*and*=r3.; This-frelation'-of the sockets 11 and 13 is utilizedto' cai'i'sean'automatic tightening efiect in consequence of send-thrust 9f the cutter. The diameter of socket 152 is slightly greater than the diameter of the locking shoe, to permit such'lat eral movement of the shoe as may be necessary to take up clearance between it and the cutter and clearance between the cutter and the wall of socket 11 diametrically opposite the shoe.

When the cotter is being driven to tighten the cutter its frictional action on the shoe moves the latter against portion 19 (Fig. 3) of the holder, and at the same time the wedging action of the cotter moves the shoe laterally toward the cutter to tighten the latter as hereinbefore explained. Thus all slack or clearance between the cutter and the portion 19 of the holder is taken up by the operation of driving the cotter, so that there will be no endwise slipping of the cutter, or chattering when the cutter is operating,

I claim:

1. A metal-working toolcomprising a cutter, a locking shoe, a cotter, and a holder having sockets for said parts, the cutter and the cotter being arranged in approximate parallelism with the shoe interposed transversely between them, the shoe and the cutter having interlocking teeth arranged to sustain end thrustagainst the cutter.

2. A metal-working tool comprising a cutter, a holder therefor, said holder having a socket for said cutter, a locking shoe, said holder having a socket for said shoe extending substantially at right angles to the cutter-socket, said cutter andshoe having interlocking teeth arranged to sustain end-thrust of the cutter, and a cotter, said holder havinga cotter-socket extending substantially at right angles to said shoe-socket, said cotter being arranged to move said shoe laterally in the direction of end-thrust of the cutter, said cotter being arranged to exercise a wedging action on said shoe to tighten the latter and the cutter.

3. Ametal-working tool comprising a cut ter, a transversely arranged locking shoe, a cotter, and a'holder having sockets for said cutter, said shoe and said cotter, said shoe and said cutter having interlocking teeth arrangedto lock the cutter against endwise movement, said shoe having a-notch to receive said cotter, said cotter being longitudinal of the cutter and arrangedto lock said shoe in the holder, and being arranged in the notch to exercise a wedging action on the shoe to interlockthe shoe with the cutter.

4. A'metal-working tool comprising a cutter, aholder therefor, a locking shoe, said holder having sockets forsaid cutter and saidshoerespectlvely, said cutter and said ShOQlIttVlDg interlocking teeth arranged to naaavos sustain end-thrust of the cutter, said shoe having a fiat face substantially opposite said teeth, and a cotter having a flat face arranged to bear on said fiat face of the shoe, said holder having a socket for said cotter, said cotter being arranged to exercise a wedging action on said flat face of the shoe to tighten the shoe and said cutter.

5. A metal-working tool comprising a cutter having a series of teeth arranged to sustain end-thrust of the cutter, a holder having a socket for said cutter, a locking shoe, said holder having a socket for said shoe, said shoe being movable transversely of said cutter and having teeth arranged to slide between said teeth of the cutter to lock the cutter against endwise movement,anda cotter having a flat face arranged at a slight incline relatively to its axis, said holder having a socket for said cotter, said cotter being arranged to exercise a wedging action on said shoe to tighten the latter and the cutter, said shoe having a flat face arranged to coact with said flat face of the cotter, said flat faces being substantially parallel to the axis of said-cutter. j

6. A metal-working tool comprisinga cutter having a series of teeth arrangedto sustain end-thrust of the cutter, a holder hav-" ing asocket for said cutter, a locking shoe, said holder having a socket for said shoe, said shoe being movable transversely of said cutter and having teeth arranged to slide between said teeth of the cutter to lock the cutter against endwise movement and a cotter, said holder having av socket for said cotter, said cutter-socket and said cottersocket being arranged to cause the cutter and cotter to converge relatively to each other when they are moved in the direction of end-thrust of the cutter.

7 A metal-working tool comprising'a cutter having a series of teeth arranged to sustain end-thrust of the cutter, a holder having a socket'for said cutter, a locking shoe, said holder having a socket for said shoe, said shoe being movable transversely of said cutter and having teeth arranged to slide between said teeth of the cutter to lockthe cutter against endwise movement, and a cylindric cotter having a flat; face arranged to slide on said shoe, said holder havinga cylindric socket for said cotter, the axis of said cotter-socket being inclined'relatively t0 the axis of said cutter-socket to cause a wedging action of saidcotter upon the shoe in consequence of endwise movement of the cotter.

In testimony whereof I have afiixed my signature;

rnnn r. LOVEJOY.

Copies of this patent may be obtained for five cents each, by addressing the :Commissioner of." IPatents Washington, D. G. 

